franstze



2 Sheets-Sheet 1.

' (No Model.)

P. J. FRAN$TZE, F. JOHNSEN, & P. (LWALL.

"Goal Min'ing Machine.

Patented March 29,1881.

"-PETEHS, PHOTO-UTNDGRAPHER, WASHINGTON, I!v C (No Model.) 7 2Sheets-Shet 2.

P. J. FRANSTZE, P. JOHNSEN, & 'P. 0. WALL. Coal Mining Machine.

No. 239,479. Patented March 29; I881.

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UNITEDSTATES OFFICE.

PAT NT PETTER J. FRANSTZE, FREDERIK JOHNSEN, AND PEDEB O. WALL, 0F OHI-OAGO, ILLINOIS, ASSlGNOR-S OF ONE-FOURTH TO CHARLES SYLVESTER AND A. H.JOHNSON, OF SAME PLACE.

COAL-MINING MACHINE.

SPECIFICATION forming part of Letters Patent No. 239, 479, dated March29, 1881.

Application filed February 1, 1881.

To all whom it may concern Be it known that we, PETTER J. FRANSTZE, asubject of the King of Norway and Sweden, residing at Chicago, in thecounty of Cook and State of Illinois, and FREDERIK J OHNSEN and PEDER O.WALL, citizens of the United States, residing at said Chicago, haveinvented certain new and useful Improvements in Coal-Mining Machines, ofwhich the following is a specification.

The object we have in view is to produce a machine for mining coal wherepower is not available, by which large quantities of coal can be minedby hand at less expense and more expeditiously than heretofore; and ourinvention consists in the peculiar novel devices and combinations ofdevices employed by us for this purpose, as fully hereinafterexplained,and pointed out by the claims.

In the accompanying drawings, forming a part hereof, Figure 1 is aperspective view of the machine arranged to cut a horizontal channel;Fig. 2, aperspective view of the bed upon which the machine is placedfor cutting vertical channels; Fig. 3, an elevation of a bit and braceused for boring; Fig. 4, an elevation and partial section of anotherbit; Fig. 5, a diagram illustrating the method employed by us for miningcoal by our machine; and Fig. 6, a section through the universal jointforming a part of our peculiar brace.

Like letters denote corresponding parts in all the figures.

tion curved ways 0, upon which rests a frame, D. I

This frame is adjusted and held upon the ways 0 by a screw, cl, operatedby a hand-wheel, and

turning through across-piece connecting the ways 0 at one end. The frameD has journaled therein the'cross-shaft E, from Which projectsdownwardly an arm, F, carrying on (No model.)

its lower end a hammer, F. This hammer, at the lower end of its stroke,works in the center of the frame B and strikes the square head g of thechisel-drill G. The square head g of the chisel-drill n'ts closely thecenter of the frame B, so that such drill cannot be turned without firstwithdrawing it somewhat. The shank of the drill passes through aguide-opening, 9 in a cross-piece of the frame B, which guide-opening isin line with the opening 01. of the board a To the cross-shaftE is alsoconnected an arm, H, to which an 'operatin g-rope, H, is attached. Bydrawing back on this rope the hammer will be raised against aleaf-spring, I, projecting from the frame D, when, by slackening saidrope suddenly, the hammer will be thrown downwardly by the spring I andbyits weight, and will strike the head of the chisel-drill. Theadjustment of the frame 1) makes it possible to move the hammer so thatit will give the most effective stroke, whether the timbers A A arelocated horizontally or on an incline.

On one end of the shaft E is a crank arm or disk, K, to which isconnected a rod, K, projectingdownwardly, and carryinga pivoted pawl, Kon its lower end. At any suitable. point throughout its length the rod Kis provided with a slot, 70, which works on a pin, is, projecting from across-piece, k connecting two of the standards c.- The timber or rail A,on which the pawl K rests, is provided with ratchet-teeth linclinedforward. Now, when the hammer is raised the crank K will be turned, and,swinging the rod K, the pawl K will engage with one of the 'ratchetteethland the carriage B will be moved forward. When the hammer is droppedthe pawl will be moved in the opposite direction, and will advanceanother tooth on the ratchet. In this manner the chisel-drill will beforced forward, cutting as it goes.

For cutting a vertical channel, we mount the frame A A upon the bedshown in Fig. 2. This is composed of two parts, L L, hinged together,and having a dovetail slot, m, which receives the heads of pins mprojecting downwardly from the center of the cross-pieces a a.

The partL has screw-threaded ears M secured to its sides at its forwardend, through which work screws N,connected at their upper ends by aplate, N. The screws Nhave gear-wheels n a on their ends above the plateN, which are connected by an intermediate gear-wheel, n turning on asleeve, n projecting up from plate J. ()neof the gear-wheelshasacrank-handle, by turning which the screws will be revolvedsimultaneously. Another screw, 0, turns upwardly through the sleeve aand is operated by a hand-wheel on itslower end. The screws N bearagainst the bottom of the tunnel or driftway, while the screw 0 isforced into the top or ceiling of the same. By turning the screws N thepart L of the bed will be raised or lowered for advancing the drill inthe channel it is cutting. By holding the part L of the bed it will actas a brace to support the part L in a horizontal position.

For cuttingahorizontal channel, the machine is mounted on the bed shownin Fig. 1. i This bed is composed of rails P P, having grooves 0, whichreceive the heads of the pins m. The rails P P are connected by pivotedpieces 19, which allow the rails to be moved toward and away from eachother, so that the frame AA can be placed square across the driftway oroblique thereto. The frame A A is moved bodily upon this bed for eachadvance cut of the chisel-drill.

There are used in connection with our machine the bits and brace shownin Figs. 3, 4. and 6. The bit Q, Fig. 3, is a short bit used forstarting a hole. It is made ofpipe with cutting-teeth q formed on itsfront end. The bit B, Fig. 4, is a longer bit, also formed of pipe, andhas cutting-teeth r and clearing-holes and slots 4 r These bits areadapted to be secured by screw-joints directly to the bracesocket S, or(if the depth of the hole make them necessary) intermediate rods, T, canbe used. The brace-socket S is a hemispherical socket, and has twostuds, 8, projecting through its walls at opposite points. These studsare preferably screws, as shown. The brace U is constructed with aspherical end, U, having a groove, to, extending around it in thedirection of the length of the brace. When the spherical end of thebrace is placed in the socket the 0 studs s will engage with the grooveu and a universal joint will be formed, which will permit the turning ofthe bit by the brace, even if it is not convenient to bring them in linewith each other. After the bore has been started the boring can be donethrough the guide-openings of the machine.

The manner of using our machine is'illustrated in the diagram, Fig. 5.We first bore a hole at r; then we mount the machine in position on bedL L and cut the vertical channel 20 then shift the machine to its otherbed and give the chisel-drill a quarter-turn and cut the horizontalchannel 00, and then reset the machine on its first bed, turn back thedrill, and cut the vertical channel y. The central hole, 2, is thenbored and acharge of blasting-powder is placed therein, which. bein gexploded, breaks down the large block of coal included between the threechannels.

What we claim as'our invention is- 1. In a coal-mining machine, thecombination, with the frame AA, of the carriage B traveling thereon, theshaft E, carrying the swinging hammer F, the crank K, slotted rod K,pawl K and ratchet-teeth Z, for advancing the hammer-carriage,substantially as de' scribed and shown.

2. In a coal-mining machine, the combination, with the frame A A,carriage B, and elevated ways (3, of the frame D, adjustable upon suchways (J, and the swinging hammer F F, carried by such frame 1),substantially as described and shown.

3. In a coal-mining machine, the combination, with thei'rames, of thebed L L, adjustable vertically by means of screws N and O, substantiallyas described and shown.

4. In a coal-mining machine, the combination, with the cutting-frames,of the rails P P, connected by pivoted bars 19, substantially asdescribed and shown.

PETTER J. FRANSTZE. FREDERIK JOHNSEN. PEDER OH. WALL.

Witnesses OLIVER W. MARBLE. F. W. KASEHAGEN.

